package see.battle.server;

import java.util.Set;

import see.battle.R;

import android.app.Activity;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;
import android.view.View;
import android.view.Window;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.AdapterView.OnItemClickListener;

public class DeviceList extends Activity {
  public static String EXTRA_DEVICE_ADDRESS = "device_address";
  private BluetoothAdapter mBtAdapter;
  private ArrayAdapter<String> mPairedDevicesArrayAdapter;
  private ArrayAdapter<String> mNewDevicesArrayAdapter;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
    setContentView(R.layout.device_list);
    setResult(Activity.RESULT_CANCELED);
    Button scanButton = (Button) findViewById(R.id.button_scan);
    scanButton.setOnClickListener(new OnClickListener() {
      public void onClick(View v) {
        doDiscovery();
        v.setVisibility(View.GONE);
      }
    });

    mPairedDevicesArrayAdapter = new ArrayAdapter<String>(
        this, R.layout.device_name);
    mNewDevicesArrayAdapter = new ArrayAdapter<String>(
        this, R.layout.device_name);

    ListView pairedListView = (ListView) findViewById(R.id.paired_devices);
    pairedListView.setAdapter(mPairedDevicesArrayAdapter);
    pairedListView.setOnItemClickListener(mDeviceClickListener);

    ListView newDevicesListView = (ListView) findViewById(R.id.new_devices);
    newDevicesListView.setAdapter(mNewDevicesArrayAdapter);
    newDevicesListView.setOnItemClickListener(mDeviceClickListener);

    IntentFilter filter = new IntentFilter(BluetoothDevice.ACTION_FOUND);
    this.registerReceiver(mReceiver, filter);

    filter = new IntentFilter(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);
    this.registerReceiver(mReceiver, filter);

    mBtAdapter = BluetoothAdapter.getDefaultAdapter();
    Set<BluetoothDevice> pairedDevices = mBtAdapter.getBondedDevices();

    if (pairedDevices.size() > 0) {
      findViewById(R.id.title_paired_devices).setVisibility(View.VISIBLE);
      for (BluetoothDevice device : pairedDevices) {
        mPairedDevicesArrayAdapter.add(device.getName() + 
            "\n" + device.getAddress());
      }
    } else {
      String noDevices = "No paired devices";
      mPairedDevicesArrayAdapter.add(noDevices);
    }
  }

  @Override
  protected void onDestroy() {
    super.onDestroy();
    if (mBtAdapter != null) {
      mBtAdapter.cancelDiscovery();
    }
    this.unregisterReceiver(mReceiver);
  }

  private void doDiscovery() {
    setProgressBarIndeterminateVisibility(true);
    setTitle("Scanning...");
    findViewById(R.id.title_new_devices).setVisibility(View.VISIBLE);
    if (mBtAdapter.isDiscovering()) {
      mBtAdapter.cancelDiscovery();
    }
    mBtAdapter.startDiscovery();
  }

  private OnItemClickListener mDeviceClickListener = 
    new OnItemClickListener() {
    public void onItemClick(AdapterView<?> av, View v, 
        int arg2, long arg3) {
      mBtAdapter.cancelDiscovery();
      String info = ((TextView) v).getText().toString();
      String address = info.substring(info.length() - 17);
      Intent intent = new Intent();
      intent.putExtra(EXTRA_DEVICE_ADDRESS, address);
      setResult(Activity.RESULT_OK, intent);
      finish();
    }
  };

  private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
    @Override
    public void onReceive(Context context, Intent intent) {
      String action = intent.getAction();
      if (BluetoothDevice.ACTION_FOUND.equals(action)) {
        BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
        if (device.getBondState() != BluetoothDevice.BOND_BONDED) {
          mNewDevicesArrayAdapter.add(device.getName() + "\n" + device.getAddress());
        }
      } else if (BluetoothAdapter.ACTION_DISCOVERY_FINISHED.equals(action)) {
        setProgressBarIndeterminateVisibility(false);
        setTitle("Select device");
        if (mNewDevicesArrayAdapter.getCount() == 0) {
          String noDevices = "No devices";
          mNewDevicesArrayAdapter.add(noDevices);
        }
      }
    }
  };
}